Yes,
The actual antenna (radiator) efficiency can be obtained by using the
LD card and specifying the conductivity of the wires. This will give
you a very reliable figure for the actual radiator efficiency (ie not
including matching network efficiencies).
The mismatch loss can be calculated from the NEC input impedance
(which is often not that accurate if the model contains modelling
errors or short segments and the like). This must subsequently be
subtracted from the NEC far field values.
This should solve the problem. Putting in a series or parallel 50 Ohm
resisitor is definitely meaningless unless you are in a receiving
situation. In that case you can replace the receiver with an
equivalent load, specify incoming plane waves and actually calculate
the received power based on the current in your load (receiver )
segment.
Hope this helps
Andre Fourie
Tel: Intl + 27 11 4030380
Fax: Intl + 27 11 4030381
Website: http://www.poynting.co.za
email: fourie_at_poynting.co.za
Papermail: Dr APC Fourie, PO Box 318, Wits, 2050, South Africa
Received on Wed Nov 26 1997 - 09:42:00 EST
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